Bar stool



FIG. 1 is a perspective view showing the front, left side, and top of the ornamental design;

FIG. 2 is a front view of the same;

FIG. 3 is a back view of the same;

FIG. 4 is a right side elevational of the same;

FIG. 5 is a left side elevational view of the same;

FIG. 6 is a top plan view of the same; and,

FIG. 7 is an underside view view of the same. 

The ornamental design for a bar stool, as shown. 